Cloud Types
Thunder
storms
Thunderstorms!
1800 at any given time
worldwide.
Most common manifestation
of extreme weather.
Cumulonimbus
Cumulonimbus clouds can
rise over 21 km (65,000 ft),
well into stratosphere and
above cruising altitude of
airliners

Introduction
Evolution of landplants led to fires:
land plants
first land plants ~425 Ma; first
trees ~385 Ma: fossil charcoal.
Frequency changed markedly at
~20 Ma with evolution of grasses:
grasses
new fuel that grew quickly and
could sustain more fre

2/17/14
Streams and Rivers
Stream: any flowing body of water,
large or small
River: major branches of a large stream
system
Carry 16 billion tons of sediment and 2 4 billion tons of dissolved material/year
Pre-human sediment transport: 9 billion
tons/

1987 UN Brundtland Report
Development which meets the needs
of the present without compromising the
ability of future generations to meet their
own needs.
Common sense: Earth has a _
finite
amount of resources. At some point we
will use something up tha

Cloud Types
Thunder storms
Thunderstorms!
1800 at any given time
worldwide.
Most common manifestation
of extreme weather.
Cumulonimbus
Cumulonimbus clouds can
rise over 21 km (65,000 ft),
well into stratosphere and
above cruising altitude of
airliners

The astronomical event of the century
1993: Eugene Shoemaker, wife
Caroline and colleague David Levy
discover a new comet.
Comet (SL9)
_had been captured by
jupiter's
_ gravity and fragmented
July 16, 1994 (25th anniversary of
Apollo 11) fragments stru

1
Natural Disaster Final Study Guide"
"
Climate Hazards:"
Venus: Receives twice as much solar radiation as earth. Only 20% reaches the surface,
venus atmosphere is 90 times more dense than earths. Almost all carbon planet 96% of
atmosphere is 96%. Net gre